High voltage synchronous machine whole digitization vector control device

A synchronous motor, all-digital technology, applied in vector control systems, motor generator control, control of electromechanical transmissions, etc., can solve the problems of low input power factor, low output frequency, and large input current harmonic content. The effect of a small speed ratio range

Active Publication Date: 2008-02-06
北京合康新能变频技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. Limited by the frequency of the power grid and the pulse number of the converter circuit, the output frequency is low;
[0007] 2. The input power factor is low;
[0008] 3. The input current has large harmonic content and complex spectrum

Method used

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  • High voltage synchronous machine whole digitization vector control device
  • High voltage synchronous machine whole digitization vector control device
  • High voltage synchronous machine whole digitization vector control device

Examples

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Embodiment Construction

[0029] The following examples are used to illustrate the present invention, but not to limit the scope of the present invention.

[0030] As shown in Figure 1, the full digital vector control device of the high-voltage synchronous motor of the present invention is composed of the following technical features and units. The three-phase high-voltage electrical input phase-shifting isolation transformer, after the phase-shifted isolation step-down multiple AC output, is input to the belt The power unit module for energy feedback, the power unit module is inverted and output to the synchronous three-phase motor; the position and speed sensor feedback signal installed on the three-phase motor is transmitted to the programmable logic device through the optical transmitter, and the programmable logic device After serial-parallel conversion processing, the signal is transmitted to the digital signal processing DSP for data calculation processing; the current feedback signal is sampled by ...

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Abstract

The present invention is a high voltage synch motor digitalized vector control device which comprises a high voltage input dephasing isolating transformer and a power unit module that is provided with energy feedback. The two units are connected in series to form a three-phase high voltage variable frequency output. The present invention also consists of a digital processor, a programmable logic component, a digital high voltage synchronous machine vector controller that is formed by relative surrounding circuit, a rotor position and speed feedback encoder that is connected with the controlled synchronous motor with the same axle and a monitor transducer of the output current of the frequency changer; the surrounding circuit consists of an optical fiber connector and an upper monitor system that gives frequency. The present invention has the advantages of less pollution to the grid, needless of reactive-load compensation equipment, fast response, wide range of speed regulation ratio, actuated by constant torque and quadrant operating power.

Description

Technical field [0001] The present invention relates to a frequency conversion control device for a synchronous motor, in particular to a direct-to-one frequency conversion device, which is mainly used for full digital vector control of a high-voltage synchronous motor. Background technique [0002] In terms of high-power AC synchronous motor drive, AC-AC variable frequency speed-regulating drive is the main one. It is generally several hundred kilowatts to several thousand kilowatts. In cement, mining and mining industry, metallurgical industry, chemical industry, petroleum and natural gas industry, non-ferrous metals, etc., especially in the fields of large-scale mine hoist transmission and speed regulation in mines, there are many applications. Large-capacity, low-speed, high-overload, fast-response, four-quadrant operation and other transmission fields are mainly used in mine hoists and main rolling mills of steel plants. Most of the applications in such systems are high-powe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/00H02P21/00H02M5/451
Inventor 沈士军
Owner 北京合康新能变频技术有限公司
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